• Cause: This could be due to a weak or unstable internet connection, or a weak Wi-Fi signal. • Solution:  Try using a wired internet connection if possible and stay close to your router. If you're using Wi-Fi, restarting your router can also help.

Depending on your PC and browser, the headset (earphone) may not be recognized if it is unplugged and plugged back in after the PC or browser has started. We apologize for the inconvenience, but please close your browser once and restart it. If the audio problem persists, please restart your PC. *For reserved lessons, you can re-enter the lesson as long as it is within your reserved time.

• Cause: Your microphone might be muted, your speaker settings might be incorrect, or your volume might be too low. • Solution: Unmute your microphone and check your computer's volume settings. Also, make sure the correct speaker is selected.

• Cause: This could be due to your camera being turned off, another application using the camera, or a driver issue. • Solution:  Make sure your camera is turned on and check if there are any other applications using the video. Also, updating your device's camera driver may be effective.